Enerboss 400C Series 2-Pipe Vertical Fan Coil

Specifications, Installation Operation and

Maintenance Manual

Coil Data

C SERIES HEATING AND COOLING COIL DATA

Coil Construction

Type

Fin Height x Finned Length (in)

Face Area (sq ft)

Fins per inch

Nominal Ton

Tube OD

Rows Deep

Air Side Performance

Flow cfm 450 450 450 600 600 600 650 650 650

Continuous low speed 284 284 284 264 264 264 247 247 247

Entering Air Dry Bulb F 70 70 70 70 70 70 70 70 70

Entering Air Wet Bulb F

Leaving Air Dry Bulb F 111 104 88 126 114 97 138 128 110

Leaving Air Wet Bulb F

Face Velocity FPM 281 281 281 389 389 389 425 425 425

Liquid Side Performance

Entering Water Temperature F 180.0 160.0 140.0 180.0 160.0 140.0 180.0 160.0 140.0

Leaving Water Temperature F 160.6 140.2 128.39 160.3 140.4 120.86 159.7 140.4 120.5

Number of Circuits ea 5 5 5 4 4 4 4 4 4

Fluid Flow gpm 2.1 1.7 1.5 2.8 2.2 1.4 3.3 2.9 2

Water Pres. Drop ft 6.6 5.3 4.6 7.5 5.6 3.2 7.7 6.3 3.7

Total Capacity Btu/hr

Sensible Capacity Btu/hr 20,323 16,845 8,705 27,562 21,522 13,395 33,492 28,383 19,501

HEATING HEATING HEATING

3/8 1/2 1/2

2 2 3

12.00 12.00 12.00

0.75 1.00 1.50

20 X10 20 x 10 20 x 10

1.39 1.39 1.39

MODEL 409 MODEL 412 MODEL 418

WATER WATER WATER

16,970

13,030

Cooling

51.9

4

4.8

13.8

45.0

67.0

59.8

58.0

432

650

247

80.0

15.6

12,452

9,846

45.0

50.1

4

4.8

396

80.0

67.0

63.3

59.8

Cooling

600

264

10.7

8,434

6,238

45.0

50.0

5

3.3

281

80.0

67.0

65.1

60.2

Cooling

450

284

WATER WATER

MODEL 409 MODEL 412 MODEL 418

WATER

20 x 10

1.39

12.00

20 x 10

1.39

12.00

20 X10

1.39

12.00

0.75 1.00 1.50

1/2

3

3/8

2

1/2

2

Additional operating points can be determined from the following output curves.

Return air filter: 10 x 20 x 1

Output

To calculate Leaving Water Temperature: EWT (F) – {(Btu/hr)/500/(gpm)}

To calculate Leaving Air Temperature: 70 + {(Btu/hr)/1.09/(CFM)}

C409 Heating Output

-

5,000

10,000

15,000

20,000

25,000

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5

gpm

Btu

/hr

EWT 100

EWT 180

EWT 160

EWT 140

EWT 120

C412 Output

-

5,000

10,000

15,000

20,000

25,000

30,000

35,000

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0

Flow (gpm)

Ou

tpu

t (B

tu/h

r)

EWT 100

EWT 180

EWT 160

EWT 150

EWT 140

EWT 120

Water side Pressure Drop The chart below shows the waterside pressure drop for the entire fan coil. This includes coil, valves,

fittings and flex connectors. Pressure drop in the risers is not included.

Water Side Pressure Drop

0.0

2.0

4.0

6.0

8.0

10.0

12.0

14.0

16.0

18.0

0.0 1.0 2.0 3.0 4.0 5.0 6.0

gpm

ft H

2O

C412

C409

C418

C418 Heating Output

-

5,000

10,000

15,000

20,000

25,000

30,000

35,000

40,000

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5

gpm

Btu

/hr

EWT 100 F

EWT 180 F

EWT 160 F

EWT 140 F

EWT 120 F

Fan Curves The supply fan is powered by an ECM operating in constant CFM mode. The delivered airflow remains

relatively constant over varying external static pressures

Supply Fan Performance

0

100

200

300

400

500

600

700

800

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

ESP (inwc)

cfm

0

100

200

300

400

500

600

700

800

Fan

Mo

tor

Po

wer

(W)

C409 CFM

C412 CFM

C418 CFm

C409 Watts

C412 Watts

C418 WattsNote:

Power for Supply fan

and controls. No

HRV Fan

The supply fan also draws outside air through the HRV. The ratio or outside air and return air is governed

by the relative amounts of static pressure in the return air stream and outside air stream. A dampered return

air grille is supplied with each unit. Closing this damper will create more return air static and result in

more outside air. The curves below show outside air flow versus outside air duct static at various damper

positions. The amount of outside air available is anywhere on the chart that falls between the fully open

damper and minimally open damper positions.

C409 HRV OA Fan Curve

0

10

20

30

40

50

60

70

80

90

100

0 0.05 0.1 0.15 0.2 0.25 0.3

ESP(inwc)

CF

M

RA Open % 100

RA Open % 50

RA Open % min

C412 HRV OA Fan Curve

0

20

40

60

80

100

120

0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4

ESP(inwc)

CF

M

RA Open % 100

RA Open % 50

RA Open % min

C418 HRV OA Fan Curve

0

20

40

60

80

100

120

0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4

ESP (inwc)

CF

M

RA Open % 100

RA Open % 50

RA Open % min

Power and Static vs OA

0

50

100

150

200

250

300

350

400

450

50 55 60 65 70 75 80 85 90 95 100 105 110

OA Flow(cfm)

Watt

s

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

409 Watts

412 Watts

418 Watts

409 RA Static

412 RA Static

418 RA Static

Example:

to increase OA on unit C409

increase RA static from 0.22 to

0.38.

The resulting power increase

is from 220 W to 235 W

Power & Return Air Static vs OA

Outside Air at Low Speed

The flow rate of outside air is a function of the main blower speed reduction from high

speed to circulation speed and to a lesser extent the duct system. The low speed outside

air flow cannot be adjusted without affecting the high speed flow rate. In most

applications the high speed ventilation rate is set during commissioning and the low

speed flow is left to float. You should expect low speed flow reductions of;

50% with the C409,

40% with the C412 and

33% with the C418.

Low speed range 40%-100% of high

HRV Efficiency

Exhaust Fan 7 Exhaust Fan 9

Power Power

Supply Temperature Net Airflow attributed to HRV SHRE ASE attributed to HRV SHRE ASE

C F l/s CFM W % % W % %

Aluminum Core 0 32 19 41 38 60 74 53 58 74

0 32 22 46 38 62 71 53 60 71

0 32 35 74 58 56 63 73 55 63

Poly Core 0 32 14 30 38 65 90 60 64 90

0 32 24 51 45 66 74 60 65 74

0 32 30 64 58 57 64 73 56 64

Enthalpy Core 0 32 18 39 38 63 73 53 61 73

0 32 24 51 45 57 65 60 56 65

0 32 33 69 59 51 58 74 50 58

HRV Exhaust Air

0

20

40

60

80

100

120

140

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

ESP (inwc)

CF

M

Exhaust Fan 8

Exhaust Fan 9

Exhaust Fan 8

Noise Levels

Operating Mode

Fancoil Type Background Noise Circulation Heating/Cooling High Ventilation

(low ventilation)

(db) (db) (db) (db)

C409 50 54 55 60

C412 50 54 60 62

C418 50 54 62 64

Levels measured 6' in front of fan coil, 40" above floor

HRV ducted, supply air unducted

Fan coil not enclosed in wall at time of measurement

Decibel weighting "C"

Electrical

.

ELECTRICAL SPECIFICATIONS

No Electric Back up 120/1 400 15

1 kW back up 120/1 1400 15

1.5 kW Back up 120/1 1900 20

CONTROLS

POWER CONDUCTOR WIRES

THERMOSTAT 24 VAC 4 18 GA

DEHUMIDISTAT 24 VAC 2 18 GA

Electrical Volts WattsBreaker

MCA

20-80% MAKE ON RISE

DESCRIPTION

HEAT COOL WITH FAN SWITCH

Operational States

The table below defines the operating state of each device (motor, valve, etc) in the unit

for all available inputs. Priority increases from left to right in the tables.

Priority to high speed calls

Defrost Damper

Off ON

D 4 min ON/36 min OFF scan at min 39 and repeat if D ON

no calls

Throttling Damper

ON Off

W+Th>100+!H+!T H

Y+Th<70+!H+!T T Input Definition

G Fan

Y Cool

Water Control Valve W Heat

Off ON Ds Dryer Interlock Switch

Y+Th<70 Th Thermister (Degrees F)

W+Th>100 D Defrost Switch

H Dehumidistat

T Timer

SAMPLE SPECIFICATION – 400C

GENERAL

System Description

Vertical 2-pipe/4-pipe fan coil with ECM motor programmed for constant CFM in heating, cooling and

circulation modes. Back-up electric heat 1kw/1.5kw (optional). Integral heat/energy recovery

ventilator with dedicated wet room exhaust and non-recirculating proportional defrost.

Quality Assurance

Each unit shall be CSA approved or equivalent.

CABINET

Description

Concealed cabinet with drywall return. Pre-finished front service panel with integral return air grill for

a non-ducted return.

Location

Interior or exterior wall within 60’ (equivalent length) of ventilation exterior wall caps.

Casing

The fan coil shall be constructed of 22 ga galvanized steel with insulation where appropriate for

thermal performance and noise reduction. Exterior surfaces shall be finished.

HYDRONIC COMPONENTS

Coils

The coil(s) shall be constructed of 3/8 x 0.014 (1/2 x 0.016) copper tube and return bend connectors.

The tubing shall be mechanically joined to corrugated aluminum fins 0.006” thick with 12 fins per

inch. Coils shall come complete with drain and vent plugs in the supply/return headers.

Coil branches and headers

The coils shall be joined to the riser stub using ⅝” type L copper tube and braided flex connectors.

Risers

The risers shall be supplied integral to the fan coil unit (optional). Risers shall be __ inches long and

flared at the top to accept the riser directly below. Riser pipe shall be insulated with 1” polyethylene

pipe wrap within the height of the fan coil. The riser diameters shall be specified in the equipment

schedule. Flexible braided connectors shall be used for thermal expansion compensation between the

riser and fan coil.

Thermistor

A thermistor attached to the coil supply pipe prevents activation of the cooling cycle when water

temperature is > 70° F and conversely prevents activation of the heating cycle below 100° F.

Control Valve

The fan coil shall come complete with a 2-way (3-way) motorized control valve normally closed to the

coil.

Isolating valves

The fan coil shall come complete with two ball valves.

AIR MOVEMENT COMPONENTS

Blower motor:

The blower motor shall be direct drive electronically commutating (ECM) and operate in constant

CFM mode. The motor shall be capable of delivering constant airflow in fan only, heating, cooling,

and high ventilation speeds.

Main Blower

The main blower shall be a DWDI forward curve GT9-DD with galvanized wheel and housing.

INTEGRAL HRV/ERV

HRV fan

Supply air shall be via the main fan. The unit shall be capable of exhausting stale air from sources of

contamination by way of a duct system and independent exhaust fan. The exhaust fan shall be

backward curved motorized impeller. High and low speed shall be adjustable by way of the fan coil

control for in-suite air balancing.

Core media

The HRV core shall be aluminum/polypropylene/enthalpy fixed plate with a Sensible Heat Recovery

Efficiency of ___% at 0 C.

Sensible heat recovery efficiency SHRE:

Aluminum core: 62% at 22 l/s

Polypropylene core: 66% at 24l/s

Enthalpy core: 57% at 24 l/s

Defrost

Unit shall have continuous non-recirculating air exchange during defrost. Fan shut down and

recirculating defrost are unacceptable.

Interlock

HRV shall be interlocked with in-suite dryer to provide make-up air during dryer operation.

ELECTRICAL

Electrical Disconnect

A 15 amp (20 amp for units with 1500 W electrical elements) dedicated circuit with overload protection is

required. Units with electric elements shall be provided with an overload fuse for the electric heater.

FILTERS

The unit shall be provided with return air, outside air and exhaust air filters.